<SEC-DOCUMENT>0001564590-22-016831.txt : 20220429
<SEC-HEADER>0001564590-22-016831.hdr.sgml : 20220429
<ACCEPTANCE-DATETIME>20220429163645
ACCESSION NUMBER:		0001564590-22-016831
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		12
CONFORMED PERIOD OF REPORT:	20220426
ITEM INFORMATION:		Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
FILED AS OF DATE:		20220429
DATE AS OF CHANGE:		20220429

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			KAISER ALUMINUM CORP
		CENTRAL INDEX KEY:			0000811596
		STANDARD INDUSTRIAL CLASSIFICATION:	ROLLING DRAWING & EXTRUDING OF NONFERROUS METALS [3350]
		IRS NUMBER:				943030279
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-09447
		FILM NUMBER:		22876343

	BUSINESS ADDRESS:	
		STREET 1:		27422 PORTOLA PARKWAY, SUITE 200
		CITY:			FOOTHILL RANCH
		STATE:			CA
		ZIP:			92610-2831
		BUSINESS PHONE:		949-614-1740

	MAIL ADDRESS:	
		STREET 1:		27422 PORTOLA PARKWAY, SUITE 200
		CITY:			FOOTHILL RANCH
		STATE:			CA
		ZIP:			92610-2831

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	KAISERTECH LTD
		DATE OF NAME CHANGE:	19901122
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>kalu-8k_20220426.htm
<DESCRIPTION>8-K
<TEXT>
<XBRL>
<?xml  version="1.0" encoding="utf-8"?>
<!-- DFIN ActiveDisclosure(SM) Inline XBRL Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date      : 2022-04-27T06:44:16.8029829+00:00 -->
<!-- Version            : 5.0.1.747 -->
<!-- Package ID         : 108f8f742d964dac8c55770663f9f1b0 -->
<!-- Copyright (c) 2022 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
<html xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns:kalu="http://www.kaiseraluminum.com/20220426" xmlns:us-types="http://fasb.org/us-types/2021-01-31" xmlns:us-gaap="http://fasb.org/us-gaap/2021-01-31" xmlns:stpr="http://xbrl.sec.gov/stpr/2021" xmlns:srt-types="http://fasb.org/srt-types/2021-01-31" xmlns:srt="http://fasb.org/srt/2021-01-31" xmlns:sic="http://xbrl.sec.gov/sic/2021" xmlns:naics="http://xbrl.sec.gov/naics/2021" xmlns:exch="http://xbrl.sec.gov/exch/2021" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2020-01-21" xmlns:dei="http://xbrl.sec.gov/dei/2021q4" xmlns:currency="http://xbrl.sec.gov/currency/2021" xmlns:country="http://xbrl.sec.gov/country/2021" xmlns:enum2="http://xbrl.org/2020/extensible-enumerations-2.0" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:utr="http://www.xbrl.org/2009/utr" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:iso4217="http://www.xbrl.org/2003/iso4217" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ix="http://www.xbrl.org/2013/inlineXBRL" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:ixt="http://www.xbrl.org/inlineXBRL/transformation/2015-02-26" xmlns:ixt-sec="http://www.sec.gov/inlineXBRL/transformation/2015-08-31" xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html" />
<title>
kalu-8k_20220426.htm
</title>
</head>
<!-- NG Converter v5.0.2.71 -->
<body><div style="display:none">
	<ix:header>
		<ix:hidden>
			<ix:nonNumeric id="F_000001" name="dei:AmendmentFlag" contextRef="C_0000811596_20220426_20220426">false</ix:nonNumeric>
			<ix:nonNumeric id="F_000004" name="dei:EntityCentralIndexKey" contextRef="C_0000811596_20220426_20220426">0000811596</ix:nonNumeric>
		</ix:hidden>
		<ix:references>
			<link:schemaRef xlink:type="simple" xlink:href="kalu-20220426.xsd" xlink:arcrole="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase"></link:schemaRef>
		</ix:references>
		<ix:resources>
			<xbrli:context id="C_0000811596_20220426_20220426">
				<xbrli:entity>
					<xbrli:identifier scheme="http://www.sec.gov/CIK">0000811596</xbrli:identifier>
				</xbrli:entity>
				<xbrli:period>
					<xbrli:startDate>2022-04-26</xbrli:startDate>
					<xbrli:endDate>2022-04-26</xbrli:endDate>
				</xbrli:period>
			</xbrli:context>
		</ix:resources>
	</ix:header>
</div>

<p style="border-bottom:Double 2.25pt;padding-bottom:1pt;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;;font-size:2pt;">&#160;</p>
<p style="text-align:center;margin-top:6pt;margin-bottom:0pt;text-indent:0%;font-weight:bold;font-size:12pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">UNITED STATES</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:12pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">SECURITIES AND EXCHANGE COMMISSION</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:12pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Washington, D.C. 20549</p>
<p style="text-align:center;border-bottom:Solid 1pt;padding-bottom:1pt;margin-bottom:0pt;margin-top:0pt;margin-left:46.15%;margin-right:46.15%;text-indent:0%;font-size:6pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p>
<p style="text-align:center;margin-top:6pt;margin-bottom:0pt;text-indent:0%;font-weight:bold;font-size:14pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">FORM <ix:nonNumeric id="F_000000" name="dei:DocumentType" contextRef="C_0000811596_20220426_20220426">8-K</ix:nonNumeric></p>
<p style="text-align:center;border-bottom:Solid 1pt;padding-bottom:1pt;margin-bottom:0pt;margin-top:0pt;margin-left:46.15%;margin-right:46.15%;text-indent:0%;font-size:6pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p>
<p style="text-align:center;margin-top:6pt;margin-bottom:0pt;text-indent:0%;font-weight:bold;font-size:12pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-size:12pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">THE SECURITIES EXCHANGE ACT OF 1934</p>
<p style="text-align:center;margin-top:6pt;margin-bottom:0pt;text-indent:0%;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">Date of Report (Date of Earliest Event Reported): <ix:nonNumeric id="F_000002" name="dei:DocumentPeriodEndDate" contextRef="C_0000811596_20220426_20220426" format="ixt:datemonthdayyearen">April 26, 2022</ix:nonNumeric></p>
<p style="text-align:center;border-bottom:Solid 1pt;padding-bottom:1pt;margin-bottom:0pt;margin-top:0pt;margin-left:46.15%;margin-right:46.15%;text-indent:0%;font-size:6pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p>
<p style="text-align:center;margin-top:6pt;margin-bottom:0pt;text-indent:0%;font-weight:bold;font-size:20pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;"><ix:nonNumeric id="F_000003" name="dei:EntityRegistrantName" contextRef="C_0000811596_20220426_20220426">KAISER ALUMINUM CORP</ix:nonNumeric>ORATION</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(Exact Name of Registrant as Specified in its Charter)</p>
<p style="text-align:center;border-bottom:Solid 1pt;padding-bottom:1pt;margin-bottom:0pt;margin-top:0pt;margin-left:46.15%;margin-right:46.15%;text-indent:0%;font-size:6pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:9pt;">&#160;</p>
<div>
<table border="0" cellspacing="0" cellpadding="0" style="margin:auto;border-collapse:collapse; width:100%;">
<tr>
<td style="width:35.9%;"></td>
<td style="width:28.21%;"></td>
<td style="width:35.9%;"></td>
</tr>
<tr>
<td valign="top">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;"><ix:nonNumeric id="F_000006" name="dei:EntityIncorporationStateCountryCode" contextRef="C_0000811596_20220426_20220426" format="ixt-sec:stateprovnameen">Delaware</ix:nonNumeric></p></td>
<td valign="top">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;"><ix:nonNumeric id="F_000007" name="dei:EntityFileNumber" contextRef="C_0000811596_20220426_20220426">1-09447</ix:nonNumeric></p></td>
<td valign="top">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;"><ix:nonNumeric id="F_000008" name="dei:EntityTaxIdentificationNumber" contextRef="C_0000811596_20220426_20220426">94-3030279</ix:nonNumeric></p></td>
</tr>
<tr>
<td valign="top">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(State or Other Jurisdiction</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">of Incorporation)</p></td>
<td valign="top">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(Commission File Number)</p></td>
<td valign="top">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(I.R.S. Employer</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Identification No.)</p></td>
</tr>
<tr>
<td valign="top">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:8pt;">&#160;</p></td>
<td valign="top">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:8pt;">&#160;</p></td>
<td valign="top">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:8pt;">&#160;</p></td>
</tr>
<tr>
<td valign="top">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;"><ix:nonNumeric id="F_000009" name="dei:EntityAddressAddressLine1" contextRef="C_0000811596_20220426_20220426">1550 West McEwen Drive</ix:nonNumeric>,</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;"><ix:nonNumeric id="F_000010" name="dei:EntityAddressAddressLine2" contextRef="C_0000811596_20220426_20220426">Suite&#160;500</ix:nonNumeric> <ix:nonNumeric id="F_000011" name="dei:EntityAddressCityOrTown" contextRef="C_0000811596_20220426_20220426">Franklin</ix:nonNumeric>, <ix:nonNumeric id="F_000012" name="dei:EntityAddressStateOrProvince" contextRef="C_0000811596_20220426_20220426" format="ixt-sec:stateprovnameen">Tennessee</ix:nonNumeric></p></td>
<td valign="top">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&#160;</p></td>
<td valign="bottom">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;"><ix:nonNumeric id="F_000013" name="dei:EntityAddressPostalZipCode" contextRef="C_0000811596_20220426_20220426">37067</ix:nonNumeric></p></td>
</tr>
<tr>
<td valign="top">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(Address of Principal Executive Offices)</p></td>
<td valign="top">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&#160;</p></td>
<td valign="top">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(Zip Code)</p></td>
</tr>
</table></div>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;;font-size:6pt;">&#160;</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;"><ix:nonNumeric id="F_000014" name="dei:CityAreaCode" contextRef="C_0000811596_20220426_20220426">(629)</ix:nonNumeric>&#160;<ix:nonNumeric id="F_000015" name="dei:LocalPhoneNumber" contextRef="C_0000811596_20220426_20220426">252-7040</ix:nonNumeric></p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(Registrant's telephone number, including area code)</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;;font-size:6pt;">&#160;</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">Not Applicable</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(Former Name or Former Address, if Changed Since Last Report)</p>
<p style="text-align:center;border-bottom:Solid 1pt;padding-bottom:1pt;margin-bottom:0pt;margin-top:0pt;margin-left:46.15%;margin-right:46.15%;text-indent:0%;font-size:6pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p>
<p style="margin-top:9pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:9pt;">&#160;</p>
<div style="align:left;">
<table border="0" cellspacing="0" cellpadding="0" style="border-collapse:collapse; width:100%;">
<tr>
<td valign="top" style="width:4%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Segoe UI Symbol;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><ix:nonNumeric id="F_000016" name="dei:WrittenCommunications" contextRef="C_0000811596_20220426_20220426" format="ixt-sec:boolballotbox">&#9744;</ix:nonNumeric></p></td>
<td valign="top" style="width:96%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Written communications pursuant to Rule&#160;425 under the Securities Act (17 CFR 230.425)</p></td>
</tr>
<tr>
<td valign="top" style="width:4%;">
<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Segoe UI Symbol;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><ix:nonNumeric id="F_000017" name="dei:SolicitingMaterial" contextRef="C_0000811596_20220426_20220426" format="ixt-sec:boolballotbox">&#9744;</ix:nonNumeric></p></td>
<td valign="top" style="width:96%;">
<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Soliciting material pursuant to Rule&#160;14a-12 under the Exchange Act (17 CFR 240.14a-12)</p></td>
</tr>
<tr>
<td valign="top" style="width:4%;">
<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Segoe UI Symbol;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><ix:nonNumeric id="F_000018" name="dei:PreCommencementTenderOffer" contextRef="C_0000811596_20220426_20220426" format="ixt-sec:boolballotbox">&#9744;</ix:nonNumeric></p></td>
<td valign="top" style="width:96%;">
<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Pre-commencement communications pursuant to Rule&#160;14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</p></td>
</tr>
<tr>
<td valign="top" style="width:4%;">
<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Segoe UI Symbol;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><ix:nonNumeric id="F_000019" name="dei:PreCommencementIssuerTenderOffer" contextRef="C_0000811596_20220426_20220426" format="ixt-sec:boolballotbox">&#9744;</ix:nonNumeric></p></td>
<td valign="top" style="width:96%;">
<p style="margin-top:6pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</p></td>
</tr>
</table></div>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:6pt;">&#160;</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Securities registered pursuant to Section 12(b) of the Act:</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:9pt;">&#160;</p>
<div style="align:left;">
<table border="0" cellspacing="0" cellpadding="0" style="border-collapse:collapse; width:100%;">
<tr>
<td valign="bottom" style="width:41.02%; border-bottom:solid 0.75pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Title of each class</p></td>
<td valign="bottom" style="width:1.3%; border-bottom:solid 0.75pt transparent;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&#160;</p></td>
<td valign="bottom" style="width:17.94%; border-bottom:solid 0.75pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Trading</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Symbol(s)</p></td>
<td valign="bottom" style="width:1.28%; border-bottom:solid 0.75pt transparent;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&#160;</p></td>
<td valign="bottom" style="width:38.46%; border-bottom:solid 0.75pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Name of each exchange on which registered</p></td>
</tr>
<tr>
<td valign="top" style="width:41.02%; border-top:solid 0.75pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><ix:nonNumeric id="F_000020" name="dei:Security12bTitle" contextRef="C_0000811596_20220426_20220426">Common Stock, par value $0.01 per share</ix:nonNumeric></p></td>
<td valign="bottom" style="width:1.3%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&#160;</p></td>
<td valign="bottom" style="width:17.94%; border-top:solid 0.75pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><ix:nonNumeric id="F_000021" name="dei:TradingSymbol" contextRef="C_0000811596_20220426_20220426">KALU</ix:nonNumeric></p></td>
<td valign="bottom" style="width:1.28%;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&#160;</p></td>
<td valign="bottom" style="width:38.46%; border-top:solid 0.75pt #000000;">
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><ix:nonNumeric id="F_000022" name="dei:SecurityExchangeName" contextRef="C_0000811596_20220426_20220426" format="ixt-sec:exchnameen">Nasdaq Global Select Market</ix:nonNumeric></p></td>
</tr>
</table></div>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:4pt;">&#160;</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Indicate by check mark whether the registrant is an emerging growth company as defined in as defined in Rule 405 of the Securities Act of 1933 (17 CFR 230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR 240.12b-2).</p>
<p style="margin-top:6pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Emerging growth company&#160;<span style="font-family:Segoe UI Symbol;"><ix:nonNumeric id="F_000005" name="dei:EntityEmergingGrowthCompany" contextRef="C_0000811596_20220426_20220426" format="ixt-sec:boolballotbox">&#9744;</ix:nonNumeric></span></p>
<p style="margin-top:6pt;margin-bottom:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standard provided pursuant to Section 13(a) of the Exchange Act.&#160;<span style="font-family:Segoe UI Symbol;">&#9744;</span></p>
<p style="border-bottom:Double 2.25pt;padding-bottom:1pt;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:6pt;">&#160;</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:6pt;">&#160;</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:6pt;">&#160;</p>
<hr style="page-break-after:always" />
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&#160;</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;color:#000000;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">Item&#160;5.02. Departure of Directors or Certain Officers&#59; Election of Directors&#59; Appointment of Certain Officers&#59; Compensatory Arrangements of Certain Officers.<span style="font-weight:normal;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</span></p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&#160;</p>
<p style="margin-bottom:12pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">As described in the proxy statement filed by Kaiser Aluminum Corporation (the &#8220;Company&#8221;) in connection with its 2022 annual meeting of stockholders on June 2, 2022 (the &#8220;2022 Annual Meeting&#8221;), after more than 15 years of leadership and dedicated service on the Company&#8217;s board of directors (the &#8220;Board&#8221;), including as a past or present member of the Company&#8217;s audit, compensation, executive and nominating and corporate governance committees, Thomas M. Van Leeuwen is not standing for re-election as a Class I Director of the Company upon the expiration of his current term, which expires at the 2022 Annual Meeting.</p>
<p style="margin-bottom:12pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">To rebalance our Board classes upon the expiration of Mr. Van Leeuwen&#8217;s term, the Board (1) determined that one of the Company&#8217;s directors should be reclassified from Class II (with a term expiring at the Company&#8217;s 2023 annual meeting of stockholders) to Class I (standing for election at the 2022 Annual Meeting) and (2) accordingly, nominated Keith A. Harvey, the Company&#8217;s President and Chief Executive Officer and a Class II Director, to stand for election as a Class I Director at the 2022 Annual Meeting.&#160;&#160;In connection with his nomination, on April 26, 2022, Mr. Harvey notified the Board of his intention to resign as a Class II Director, contingent upon his election as a Class I Director at the 2022 Annual Meeting.&#160;&#160;Mr. Harvey&#8217;s decision to resign as a Class II Director is solely to facilitate his election as a Class I Director at the 2022 Annual Meeting.</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&#160;</p>
<hr style="page-break-after:always" />
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&#160;</p>
<p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">SIGNATURES</p>
<p style="margin-top:12pt;margin-bottom:0pt;text-indent:3.85%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&#160;</p>
<div>
<table border="0" cellspacing="0" cellpadding="0" style="margin:auto;border-collapse:collapse; width:100%;">
<tr>
<td valign="top" style="background-color:#FFFFFF;padding-left:0pt;padding-Right:0.75pt;padding-Top:0.75pt;padding-Bottom:0pt;width:45%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&#160;</p></td>
<td valign="bottom" style="background-color:#FFFFFF;padding-left:0pt;padding-Right:0.75pt;padding-Top:0.75pt;padding-Bottom:0pt;width:5%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p></td>
<td colspan="2" valign="bottom" style="background-color:#FFFFFF;padding-left:0pt;padding-Right:0.75pt;padding-Top:0.75pt;padding-Bottom:0pt;width:49%;">
<p style="margin-top:2pt;margin-bottom:0pt;margin-left:0pt;;margin-right:0.43%;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">KAISER ALUMINUM CORPORATION</p>
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(Registrant)</p></td>
</tr>
<tr>
<td valign="middle" style="background-color:#FFFFFF;padding-left:0pt;padding-Right:0.75pt;padding-Top:0.75pt;padding-Bottom:0pt;width:45%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p></td>
<td valign="bottom" style="background-color:#FFFFFF;padding-left:0pt;padding-Right:0.75pt;padding-Top:0.75pt;padding-Bottom:0pt;width:5%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p></td>
<td valign="bottom" style="background-color:#FFFFFF;padding-left:0pt;padding-Right:0.75pt;padding-Top:0.75pt;padding-Bottom:0pt;width:3%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p></td>
<td valign="bottom" style="background-color:#FFFFFF;padding-left:0pt;padding-Right:0.75pt;padding-Top:0.75pt;padding-Bottom:0pt;width:45%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p></td>
</tr>
<tr>
<td valign="bottom" style="background-color:#FFFFFF;padding-left:0pt;padding-Right:0.75pt;padding-Top:0.75pt;width:45%; border-bottom:solid 0.75pt transparent;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;">&#160;</p></td>
<td valign="bottom" style="background-color:#FFFFFF;padding-left:0pt;padding-Right:0.75pt;padding-Top:0.75pt;width:5%; border-bottom:solid 0.75pt transparent;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p></td>
<td valign="top" style="background-color:#FFFFFF;padding-left:0pt;padding-Right:0.75pt;padding-Top:0.75pt;width:3%; border-bottom:solid 0.75pt transparent;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">By:</p></td>
<td valign="bottom" style="background-color:#FFFFFF;padding-left:0pt;padding-Right:0.75pt;padding-Top:0.75pt;padding-Bottom:0pt;width:45%; border-bottom:solid 0.75pt #000000;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">/s/ Cherrie I. Tsai</p></td>
</tr>
<tr>
<td valign="bottom" style="background-color:#FFFFFF;padding-left:0pt;padding-Right:0.75pt;padding-Top:0.75pt;padding-Bottom:0pt;width:45%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p></td>
<td valign="bottom" style="background-color:#FFFFFF;padding-left:0pt;padding-Right:0.75pt;padding-Top:0.75pt;padding-Bottom:0pt;width:5%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p></td>
<td valign="middle" style="background-color:#FFFFFF;padding-left:0pt;padding-Right:0.75pt;padding-Top:0.75pt;padding-Bottom:0pt;width:3%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;color:#000000;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p></td>
<td valign="bottom" style="background-color:#FFFFFF;padding-left:0pt;padding-Right:0.75pt;padding-Top:0.75pt;padding-Bottom:0pt;width:45%; border-top:solid 0.75pt #000000;">
<p style="margin-top:2pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Cherrie I. Tsai</p></td>
</tr>
<tr>
<td valign="bottom" style="background-color:#FFFFFF;padding-left:0pt;padding-Right:0.75pt;padding-Top:0.75pt;padding-Bottom:0pt;width:45%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p></td>
<td valign="bottom" style="background-color:#FFFFFF;padding-left:0pt;padding-Right:0.75pt;padding-Top:0.75pt;padding-Bottom:0pt;width:5%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p></td>
<td valign="bottom" style="background-color:#FFFFFF;padding-left:0pt;padding-Right:0.75pt;padding-Top:0.75pt;padding-Bottom:0pt;width:3%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-weight:bold;color:#000000;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">&#160;</p></td>
<td valign="bottom" style="background-color:#FFFFFF;padding-left:0pt;padding-Right:0.75pt;padding-Top:0.75pt;padding-Bottom:0pt;width:45%;">
<p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Vice President, Deputy General Counsel and Corporate Secretary</p></td>
</tr>
</table></div>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&#160;</p>
<p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Date: April 29, 2022</p></body>
</html>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.SCH
<SEQUENCE>2
<FILENAME>kalu-20220426.xsd
<DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA
<TEXT>
<XBRL>
<?xml version="1.0" encoding="us-ascii"?>
<!-- DFIN ActiveDisclosure(SM) XBRL Schema Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date      : 2022-04-27T06:44:16.8029829+00:00 -->
<!-- Version            : 5.0.1.747 -->
<!-- Package ID         : 108f8f742d964dac8c55770663f9f1b0 -->
<!-- Copyright (c) 2022 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
<xsd:schema xmlns:dei="http://xbrl.sec.gov/dei/2021q4" xmlns:us-types="http://fasb.org/us-types/2021-01-31" xmlns:stpr="http://xbrl.sec.gov/stpr/2021" xmlns:srt-types="http://fasb.org/srt-types/2021-01-31" xmlns:exch="http://xbrl.sec.gov/exch/2021" xmlns:sic="http://xbrl.sec.gov/sic/2021" xmlns:kalu="http://www.kaiseraluminum.com/20220426" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:srt="http://fasb.org/srt/2021-01-31" xmlns:enum2="http://xbrl.org/2020/extensible-enumerations-2.0" xmlns:us-gaap="http://fasb.org/us-gaap/2021-01-31" xmlns:naics="http://xbrl.sec.gov/naics/2021" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:country="http://xbrl.sec.gov/country/2021" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:currency="http://xbrl.sec.gov/currency/2021" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2020-01-21" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.kaiseraluminum.com/20220426" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <xsd:import schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" namespace="http://www.xbrl.org/2003/instance" />
  <xsd:import schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" namespace="http://www.xbrl.org/2003/linkbase" />
  <xsd:import schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" namespace="http://xbrl.org/2005/xbrldt" />
  <xsd:import schemaLocation="https://www.xbrl.org/2020/extensible-enumerations-2.0.xsd" namespace="http://xbrl.org/2020/extensible-enumerations-2.0" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/country/2021/country-2021.xsd" namespace="http://xbrl.sec.gov/country/2021" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/currency/2021/currency-2021.xsd" namespace="http://xbrl.sec.gov/currency/2021" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd" namespace="http://xbrl.sec.gov/dei/2021q4" />
  <xsd:import schemaLocation="https://www.xbrl.org/dtr/type/2020-01-21/types.xsd" namespace="http://www.xbrl.org/dtr/type/2020-01-21" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/exch/2021/exch-2021.xsd" namespace="http://xbrl.sec.gov/exch/2021" />
  <xsd:import schemaLocation="http://www.xbrl.org/lrr/arcrole/factExplanatory-2009-12-16.xsd" namespace="http://www.xbrl.org/2009/arcrole/fact-explanatoryFact" />
  <xsd:import schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd" namespace="http://www.xbrl.org/2009/role/negated" />
  <xsd:import schemaLocation="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd" namespace="http://www.xbrl.org/2009/role/net" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/naics/2021/naics-2021.xsd" namespace="http://xbrl.sec.gov/naics/2021" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/sic/2021/sic-2021.xsd" namespace="http://xbrl.sec.gov/sic/2021" />
  <xsd:import schemaLocation="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd" namespace="http://fasb.org/srt/2021-01-31" />
  <xsd:import schemaLocation="https://xbrl.fasb.org/srt/2021/elts/srt-roles-2021-01-31.xsd" namespace="http://fasb.org/srt-roles/2021-01-31" />
  <xsd:import schemaLocation="https://xbrl.fasb.org/srt/2021/elts/srt-types-2021-01-31.xsd" namespace="http://fasb.org/srt-types/2021-01-31" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/stpr/2021/stpr-2021.xsd" namespace="http://xbrl.sec.gov/stpr/2021" />
  <xsd:import schemaLocation="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd" namespace="http://fasb.org/us-gaap/2021-01-31" />
  <xsd:import schemaLocation="https://xbrl.fasb.org/us-gaap/2021/elts/us-roles-2021-01-31.xsd" namespace="http://fasb.org/us-roles/2021-01-31" />
  <xsd:import schemaLocation="https://xbrl.fasb.org/us-gaap/2021/elts/us-types-2021-01-31.xsd" namespace="http://fasb.org/us-types/2021-01-31" />
  <xsd:annotation>
    <xsd:appinfo>
      <link:roleType id="TemplateLink" roleURI="http://www.kaiseraluminum.com/20220426/role/TemplateLink" xmlns:link="http://www.xbrl.org/2003/linkbase">
        <link:definition>00000 - Document - Template Link</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="kalu-20220426_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:title="Label Links, all" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="kalu-20220426_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:title="Presentation Links, all" xlink:type="simple" />
      <link:roleType roleURI="http://www.kaiseraluminum.com/20220426/taxonomy/role/DocumentDocumentAndEntityInformation" id="Role_DocumentDocumentAndEntityInformation">
        <link:definition>100000 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xsd:appinfo>
  </xsd:annotation>
</xsd:schema>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.LAB
<SEQUENCE>3
<FILENAME>kalu-20220426_lab.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE
<TEXT>
<XBRL>
<?xml version="1.0" encoding="us-ascii" standalone="yes"?>
<!-- DFIN ActiveDisclosure(SM) XBRL Linkbase Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date      : 2022-04-27T06:44:16.8029829+00:00 -->
<!-- Version            : 5.0.1.747 -->
<!-- Package ID         : 108f8f742d964dac8c55770663f9f1b0 -->
<!-- Copyright (c) 2022 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://fasb.org/us-gaap/role/label/axisDefault" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-roles-2021-01-31.xsd#axisDefault" xlink:type="simple" />
  <link:labelLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityCentralIndexKey" xlink:type="locator" xlink:label="dei_EntityCentralIndexKey" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Central Index Key</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCentralIndexKey" xlink:to="dei_EntityCentralIndexKey_lbl" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_CoverAbstract" xlink:type="locator" xlink:label="dei_CoverAbstract" />
    <link:label xml:lang="en-US" xlink:label="dei_CoverAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Cover [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CoverAbstract" xlink:to="dei_CoverAbstract_lbl" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_DocumentType" xlink:type="locator" xlink:label="dei_DocumentType" />
    <link:label xml:lang="en-US" xlink:label="dei_DocumentType_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentType" xlink:to="dei_DocumentType_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_DocumentType_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Document Type</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_AmendmentFlag" xlink:type="locator" xlink:label="dei_AmendmentFlag" />
    <link:label xml:lang="en-US" xlink:label="dei_AmendmentFlag_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amendment Flag</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_AmendmentFlag" xlink:to="dei_AmendmentFlag_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_AmendmentFlag_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Amendment Flag</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_DocumentPeriodEndDate" xlink:type="locator" xlink:label="dei_DocumentPeriodEndDate" />
    <link:label xml:lang="en-US" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Period End Date</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentPeriodEndDate" xlink:to="dei_DocumentPeriodEndDate_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Document Period End Date</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityRegistrantName" xlink:type="locator" xlink:label="dei_EntityRegistrantName" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityRegistrantName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Registrant Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityRegistrantName" xlink:to="dei_EntityRegistrantName_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityRegistrantName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Registrant Name</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Central Index Key</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityEmergingGrowthCompany" xlink:type="locator" xlink:label="dei_EntityEmergingGrowthCompany" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Emerging Growth Company</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityEmergingGrowthCompany" xlink:to="dei_EntityEmergingGrowthCompany_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Emerging Growth Company</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityIncorporationStateCountryCode" xlink:type="locator" xlink:label="dei_EntityIncorporationStateCountryCode" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Incorporation State Country Code</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityIncorporationStateCountryCode" xlink:to="dei_EntityIncorporationStateCountryCode_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Incorporation State Country Code</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityFileNumber" xlink:type="locator" xlink:label="dei_EntityFileNumber" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityFileNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity File Number</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityFileNumber" xlink:to="dei_EntityFileNumber_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityFileNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity File Number</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityTaxIdentificationNumber" xlink:type="locator" xlink:label="dei_EntityTaxIdentificationNumber" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Tax Identification Number</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityTaxIdentificationNumber" xlink:to="dei_EntityTaxIdentificationNumber_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Tax Identification Number</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressAddressLine1" xlink:type="locator" xlink:label="dei_EntityAddressAddressLine1" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Address Line One</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressAddressLine1" xlink:to="dei_EntityAddressAddressLine1_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address Address Line1</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressAddressLine2" xlink:type="locator" xlink:label="dei_EntityAddressAddressLine2" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressAddressLine2_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Address Line Two</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressAddressLine2" xlink:to="dei_EntityAddressAddressLine2_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressAddressLine2_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address Address Line2</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressCityOrTown" xlink:type="locator" xlink:label="dei_EntityAddressCityOrTown" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, City or Town</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressCityOrTown" xlink:to="dei_EntityAddressCityOrTown_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address City Or Town</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressStateOrProvince" xlink:type="locator" xlink:label="dei_EntityAddressStateOrProvince" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, State or Province</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressStateOrProvince" xlink:to="dei_EntityAddressStateOrProvince_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address State Or Province</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressPostalZipCode" xlink:type="locator" xlink:label="dei_EntityAddressPostalZipCode" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Postal Zip Code</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressPostalZipCode" xlink:to="dei_EntityAddressPostalZipCode_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address Postal Zip Code</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_CityAreaCode" xlink:type="locator" xlink:label="dei_CityAreaCode" />
    <link:label xml:lang="en-US" xlink:label="dei_CityAreaCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">City Area Code</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CityAreaCode" xlink:to="dei_CityAreaCode_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_CityAreaCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">City Area Code</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_LocalPhoneNumber" xlink:type="locator" xlink:label="dei_LocalPhoneNumber" />
    <link:label xml:lang="en-US" xlink:label="dei_LocalPhoneNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Local Phone Number</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_LocalPhoneNumber" xlink:to="dei_LocalPhoneNumber_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_LocalPhoneNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Local Phone Number</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_WrittenCommunications" xlink:type="locator" xlink:label="dei_WrittenCommunications" />
    <link:label xml:lang="en-US" xlink:label="dei_WrittenCommunications_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Written Communications</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_WrittenCommunications" xlink:to="dei_WrittenCommunications_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_WrittenCommunications_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Written Communications</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_SolicitingMaterial" xlink:type="locator" xlink:label="dei_SolicitingMaterial" />
    <link:label xml:lang="en-US" xlink:label="dei_SolicitingMaterial_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Soliciting Material</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_SolicitingMaterial" xlink:to="dei_SolicitingMaterial_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_SolicitingMaterial_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Soliciting Material</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_PreCommencementTenderOffer" xlink:type="locator" xlink:label="dei_PreCommencementTenderOffer" />
    <link:label xml:lang="en-US" xlink:label="dei_PreCommencementTenderOffer_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pre Commencement Tender Offer</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_PreCommencementTenderOffer" xlink:to="dei_PreCommencementTenderOffer_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_PreCommencementTenderOffer_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Pre Commencement Tender Offer</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_PreCommencementIssuerTenderOffer" xlink:type="locator" xlink:label="dei_PreCommencementIssuerTenderOffer" />
    <link:label xml:lang="en-US" xlink:label="dei_PreCommencementIssuerTenderOffer_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pre Commencement Issuer Tender Offer</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_PreCommencementIssuerTenderOffer" xlink:to="dei_PreCommencementIssuerTenderOffer_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_PreCommencementIssuerTenderOffer_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Pre Commencement Issuer Tender Offer</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_Security12bTitle" xlink:type="locator" xlink:label="dei_Security12bTitle" />
    <link:label xml:lang="en-US" xlink:label="dei_Security12bTitle_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Security 12b Title</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_Security12bTitle" xlink:to="dei_Security12bTitle_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_Security12bTitle_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Security12b Title</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_TradingSymbol" xlink:type="locator" xlink:label="dei_TradingSymbol" />
    <link:label xml:lang="en-US" xlink:label="dei_TradingSymbol_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trading Symbol</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_TradingSymbol" xlink:to="dei_TradingSymbol_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_TradingSymbol_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Trading Symbol</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_SecurityExchangeName" xlink:type="locator" xlink:label="dei_SecurityExchangeName" />
    <link:label xml:lang="en-US" xlink:label="dei_SecurityExchangeName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Security Exchange Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_SecurityExchangeName" xlink:to="dei_SecurityExchangeName_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_SecurityExchangeName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Security Exchange Name</link:label>
  </link:labelLink>
</link:linkbase>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.PRE
<SEQUENCE>4
<FILENAME>kalu-20220426_pre.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE
<TEXT>
<XBRL>
<?xml version="1.0" encoding="us-ascii" standalone="yes"?>
<!-- DFIN ActiveDisclosure(SM) XBRL Linkbase Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date      : 2022-04-27T06:44:16.8029829+00:00 -->
<!-- Version            : 5.0.1.747 -->
<!-- Package ID         : 108f8f742d964dac8c55770663f9f1b0 -->
<!-- Copyright (c) 2022 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.kaiseraluminum.com/20220426/role/TemplateLink" xlink:href="kalu-20220426.xsd#TemplateLink" xlink:type="simple" />
  <link:roleRef roleURI="http://www.kaiseraluminum.com/20220426/taxonomy/role/DocumentDocumentAndEntityInformation" xlink:href="kalu-20220426.xsd#Role_DocumentDocumentAndEntityInformation" xlink:type="simple" />
  <link:presentationLink xlink:type="extended" xlink:role="http://www.kaiseraluminum.com/20220426/taxonomy/role/DocumentDocumentAndEntityInformation">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_SecurityExchangeName" xlink:type="locator" xlink:label="dei_SecurityExchangeName" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_TradingSymbol" xlink:type="locator" xlink:label="dei_TradingSymbol" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_Security12bTitle" xlink:type="locator" xlink:label="dei_Security12bTitle" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_PreCommencementIssuerTenderOffer" xlink:type="locator" xlink:label="dei_PreCommencementIssuerTenderOffer" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_PreCommencementTenderOffer" xlink:type="locator" xlink:label="dei_PreCommencementTenderOffer" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_SolicitingMaterial" xlink:type="locator" xlink:label="dei_SolicitingMaterial" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_WrittenCommunications" xlink:type="locator" xlink:label="dei_WrittenCommunications" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_LocalPhoneNumber" xlink:type="locator" xlink:label="dei_LocalPhoneNumber" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_CityAreaCode" xlink:type="locator" xlink:label="dei_CityAreaCode" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressPostalZipCode" xlink:type="locator" xlink:label="dei_EntityAddressPostalZipCode" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressStateOrProvince" xlink:type="locator" xlink:label="dei_EntityAddressStateOrProvince" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressCityOrTown" xlink:type="locator" xlink:label="dei_EntityAddressCityOrTown" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressAddressLine2" xlink:type="locator" xlink:label="dei_EntityAddressAddressLine2" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressAddressLine1" xlink:type="locator" xlink:label="dei_EntityAddressAddressLine1" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityTaxIdentificationNumber" xlink:type="locator" xlink:label="dei_EntityTaxIdentificationNumber" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityFileNumber" xlink:type="locator" xlink:label="dei_EntityFileNumber" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityIncorporationStateCountryCode" xlink:type="locator" xlink:label="dei_EntityIncorporationStateCountryCode" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityEmergingGrowthCompany" xlink:type="locator" xlink:label="dei_EntityEmergingGrowthCompany" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityCentralIndexKey" xlink:type="locator" xlink:label="dei_EntityCentralIndexKey" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityRegistrantName" xlink:type="locator" xlink:label="dei_EntityRegistrantName" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_DocumentPeriodEndDate" xlink:type="locator" xlink:label="dei_DocumentPeriodEndDate" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_AmendmentFlag" xlink:type="locator" xlink:label="dei_AmendmentFlag" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_DocumentType" xlink:type="locator" xlink:label="dei_DocumentType" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_CoverAbstract" xlink:type="locator" xlink:label="dei_CoverAbstract" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_DocumentType" order="10010.00" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_AmendmentFlag" order="10030.00" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_DocumentPeriodEndDate" order="10050.00" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityRegistrantName" order="10070.00" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityCentralIndexKey" order="10090.00" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityEmergingGrowthCompany" order="10110.00" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityIncorporationStateCountryCode" order="10130.00" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityFileNumber" order="10150.00" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityTaxIdentificationNumber" order="10170.00" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressAddressLine1" order="10190.00" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressAddressLine2" order="10210.00" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressCityOrTown" order="10230.00" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressStateOrProvince" order="10250.00" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressPostalZipCode" order="10270.00" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_CityAreaCode" order="10290.00" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_LocalPhoneNumber" order="10310.00" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_WrittenCommunications" order="10330.00" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_SolicitingMaterial" order="10350.00" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_PreCommencementTenderOffer" order="10370.00" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_PreCommencementIssuerTenderOffer" order="10390.00" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_Security12bTitle" order="10410.00" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_TradingSymbol" order="10450.00" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_SecurityExchangeName" order="10490.00" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
  </link:presentationLink>
</link:linkbase>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>5
<FILENAME>R1.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
							function toggleNextSibling (e) {
							if (e.nextSibling.style.display=='none') {
							e.nextSibling.style.display='block';
							} else { e.nextSibling.style.display='none'; }
							}</script>
</head>
<body>
<span style="display: none;">v3.22.1</span><table class="report" border="0" cellspacing="2" id="idm139766350511080">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Document and Entity Information<br></strong></div></th>
<th class="th"><div>Apr. 26, 2022</div></th>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_CoverAbstract', window );"><strong>Cover [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_DocumentType', window );">Document Type</a></td>
<td class="text">8-K<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_AmendmentFlag', window );">Amendment Flag</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_DocumentPeriodEndDate', window );">Document Period End Date</a></td>
<td class="text">Apr. 26,  2022<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityRegistrantName', window );">Entity Registrant Name</a></td>
<td class="text">KAISER ALUMINUM CORP<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityCentralIndexKey', window );">Entity Central Index Key</a></td>
<td class="text">0000811596<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityEmergingGrowthCompany', window );">Entity Emerging Growth Company</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityIncorporationStateCountryCode', window );">Entity Incorporation State Country Code</a></td>
<td class="text">DE<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityFileNumber', window );">Entity File Number</a></td>
<td class="text">1-09447<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityTaxIdentificationNumber', window );">Entity Tax Identification Number</a></td>
<td class="text">94-3030279<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityAddressAddressLine1', window );">Entity Address, Address Line One</a></td>
<td class="text">1550 West McEwen Drive<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityAddressAddressLine2', window );">Entity Address, Address Line Two</a></td>
<td class="text">Suite&#160;500<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityAddressCityOrTown', window );">Entity Address, City or Town</a></td>
<td class="text">Franklin<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityAddressStateOrProvince', window );">Entity Address, State or Province</a></td>
<td class="text">TN<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityAddressPostalZipCode', window );">Entity Address, Postal Zip Code</a></td>
<td class="text">37067<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_CityAreaCode', window );">City Area Code</a></td>
<td class="text">(629)<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_LocalPhoneNumber', window );">Local Phone Number</a></td>
<td class="text">252-7040<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_WrittenCommunications', window );">Written Communications</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_SolicitingMaterial', window );">Soliciting Material</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_PreCommencementTenderOffer', window );">Pre Commencement Tender Offer</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_PreCommencementIssuerTenderOffer', window );">Pre Commencement Issuer Tender Offer</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_Security12bTitle', window );">Security 12b Title</a></td>
<td class="text">Common Stock, par value $0.01 per share<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">KALU<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NASDAQ<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_AmendmentFlag">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_AmendmentFlag</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_CityAreaCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Area code of city</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_CityAreaCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_CoverAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Cover page.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_CoverAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentPeriodEndDate">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period.  The format of the date is YYYY-MM-DD.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentPeriodEndDate</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:dateItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentType">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentType</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:submissionTypeItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressAddressLine1">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Address Line 1 such as Attn, Building Name, Street Name</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressAddressLine1</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressAddressLine2">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Address Line 2 such as Street or Suite number</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressAddressLine2</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressCityOrTown">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Name of the City or Town</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressCityOrTown</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressPostalZipCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Code for the postal or zip code</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressPostalZipCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressStateOrProvince">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Name of the state or province.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressStateOrProvince</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:stateOrProvinceItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityCentralIndexKey">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityCentralIndexKey</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:centralIndexKeyItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityEmergingGrowthCompany">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Indicate if registrant meets the emerging growth company criteria.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityEmergingGrowthCompany</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityFileNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityFileNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:fileNumberItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityIncorporationStateCountryCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Two-character EDGAR code representing the state or country of incorporation.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityIncorporationStateCountryCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:edgarStateCountryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityRegistrantName">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityRegistrantName</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityTaxIdentificationNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityTaxIdentificationNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:employerIdItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_LocalPhoneNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Local phone number for entity.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_LocalPhoneNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_PreCommencementIssuerTenderOffer">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 13e<br> -Subsection 4c<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_PreCommencementIssuerTenderOffer</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_PreCommencementTenderOffer">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 14d<br> -Subsection 2b<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_PreCommencementTenderOffer</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_Security12bTitle">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Title of a 12(b) registered security.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_Security12bTitle</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:securityTitleItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_SecurityExchangeName">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Name of the Exchange on which a security is registered.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection d1-1<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_SecurityExchangeName</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:edgarExchangeCodeItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_SolicitingMaterial">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Section 14a<br> -Number 240<br> -Subsection 12<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_SolicitingMaterial</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_TradingSymbol">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Trading symbol of an instrument as listed on an exchange.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_TradingSymbol</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:tradingSymbolItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_WrittenCommunications">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br> -Section 425<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_WrittenCommunications</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
</div>
</body>
</html>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>6
<FILENAME>kalu-8k_20220426_htm.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<XML>
<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2021q4"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="kalu-20220426.xsd" xlink:type="simple"/>
    <context id="C_0000811596_20220426_20220426">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000811596</identifier>
        </entity>
        <period>
            <startDate>2022-04-26</startDate>
            <endDate>2022-04-26</endDate>
        </period>
    </context>
    <dei:AmendmentFlag contextRef="C_0000811596_20220426_20220426" id="F_000001">false</dei:AmendmentFlag>
    <dei:EntityCentralIndexKey contextRef="C_0000811596_20220426_20220426" id="F_000004">0000811596</dei:EntityCentralIndexKey>
    <dei:DocumentType contextRef="C_0000811596_20220426_20220426" id="F_000000">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate contextRef="C_0000811596_20220426_20220426" id="F_000002">2022-04-26</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName contextRef="C_0000811596_20220426_20220426" id="F_000003">KAISER ALUMINUM CORP</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode contextRef="C_0000811596_20220426_20220426" id="F_000006">DE</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber contextRef="C_0000811596_20220426_20220426" id="F_000007">1-09447</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber contextRef="C_0000811596_20220426_20220426" id="F_000008">94-3030279</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1 contextRef="C_0000811596_20220426_20220426" id="F_000009">1550 West McEwen Drive</dei:EntityAddressAddressLine1>
    <dei:EntityAddressAddressLine2 contextRef="C_0000811596_20220426_20220426" id="F_000010">Suite&#160;500</dei:EntityAddressAddressLine2>
    <dei:EntityAddressCityOrTown contextRef="C_0000811596_20220426_20220426" id="F_000011">Franklin</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince contextRef="C_0000811596_20220426_20220426" id="F_000012">TN</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode contextRef="C_0000811596_20220426_20220426" id="F_000013">37067</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode contextRef="C_0000811596_20220426_20220426" id="F_000014">(629)</dei:CityAreaCode>
    <dei:LocalPhoneNumber contextRef="C_0000811596_20220426_20220426" id="F_000015">252-7040</dei:LocalPhoneNumber>
    <dei:WrittenCommunications contextRef="C_0000811596_20220426_20220426" id="F_000016">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial contextRef="C_0000811596_20220426_20220426" id="F_000017">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer contextRef="C_0000811596_20220426_20220426" id="F_000018">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer contextRef="C_0000811596_20220426_20220426" id="F_000019">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle contextRef="C_0000811596_20220426_20220426" id="F_000020">Common Stock, par value $0.01 per share</dei:Security12bTitle>
    <dei:TradingSymbol contextRef="C_0000811596_20220426_20220426" id="F_000021">KALU</dei:TradingSymbol>
    <dei:SecurityExchangeName contextRef="C_0000811596_20220426_20220426" id="F_000022">NASDAQ</dei:SecurityExchangeName>
    <dei:EntityEmergingGrowthCompany contextRef="C_0000811596_20220426_20220426" id="F_000005">false</dei:EntityEmergingGrowthCompany>
</xbrl>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EXCEL
<SEQUENCE>7
<FILENAME>Financial_Report.xlsx
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
begin 644 Financial_Report.xlsx
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M$3_51D;'8""(1'SX9!_'1%P20(\!-.,^/"BC'#'#^ETE=T39WJ!F+[*A9M$
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M<7:YY0R6FNT WZ^E-*>&?3W.?]WH_PM02P,$%     @ D82=5)^@&_"Q @
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M\SR. !9GD*88 J<11S &P %#TG1X#SY['R73>RHY_U=3_ 102P,$%     @
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M&\[Q$<+NOS^QO-9.&G_FB^$_7G\!4$L! A0#%     @ D82=5 =!36*!
ML0   !               ( !     &1O8U!R;W!S+V%P<"YX;6Q02P$"% ,4
M    " "1A)U4MWW.-.X    K @  $0              @ &O    9&]C4')O
M<',O8V]R92YX;6Q02P$"% ,4    " "1A)U4F5R<(Q &  "<)P  $P
M        @ ', 0  >&PO=&AE;64O=&AE;64Q+GAM;%!+ 0(4 Q0    ( )&$
MG52!9_3"3P0  .D0   8              " @0T(  !X;"]W;W)K<VAE971S
M+W-H965T,2YX;6Q02P$"% ,4    " "1A)U4GZ ;\+$"  #B#   #0
M        @ &2#   >&PO<W1Y;&5S+GAM;%!+ 0(4 Q0    ( )&$G527BKL<
MP    !,"   +              "  6X/  !?<F5L<R\N<F5L<U!+ 0(4 Q0
M   ( )&$G50<.&7J/P$  #P"   /              "  5<0  !X;"]W;W)K
M8F]O:RYX;6Q02P$"% ,4    " "1A)U4)!Z;HJT   #X 0  &@
M    @ '#$0  >&PO7W)E;',O=V]R:V)O;VLN>&UL+G)E;'-02P$"% ,4
M" "1A)U499!YDAD!  #/ P  $P              @ &H$@  6T-O;G1E;G1?
@5'EP97-=+GAM;%!+!08     "0 ) #X"  #R$P     !

end
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>8
<FILENAME>Show.js
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
// Edgar(tm) Renderer was created by staff of the U.S. Securities and Exchange Commission.  Data and content created by government employees within the scope of their employment are not subject to domestic copyright protection. 17 U.S.C. 105.
var Show={};Show.LastAR=null,Show.showAR=function(a,r,w){if(Show.LastAR)Show.hideAR();var e=a;while(e&&e.nodeName!='TABLE')e=e.nextSibling;if(!e||e.nodeName!='TABLE'){var ref=((window)?w.document:document).getElementById(r);if(ref){e=ref.cloneNode(!0);
e.removeAttribute('id');a.parentNode.appendChild(e)}}
if(e)e.style.display='block';Show.LastAR=e};Show.hideAR=function(){Show.LastAR.style.display='none'};Show.toggleNext=function(a){var e=a;while(e.nodeName!='DIV')e=e.nextSibling;if(!e.style){}else if(!e.style.display){}else{var d,p_;if(e.style.display=='none'){d='block';p='-'}else{d='none';p='+'}
e.style.display=d;if(a.textContent){a.textContent=p+a.textContent.substring(1)}else{a.innerText=p+a.innerText.substring(1)}}}
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>9
<FILENAME>report.css
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
/* Updated 2009-11-04 */
/* v2.2.0.24 */

/* DefRef Styles */
..report table.authRefData{
	background-color: #def;
	border: 2px solid #2F4497;
	font-size: 1em;
	position: absolute;
}

..report table.authRefData a {
	display: block;
	font-weight: bold;
}

..report table.authRefData p {
	margin-top: 0px;
}

..report table.authRefData .hide {
	background-color: #2F4497;
	padding: 1px 3px 0px 0px;
	text-align: right;
}

..report table.authRefData .hide a:hover {
	background-color: #2F4497;
}

..report table.authRefData .body {
	height: 150px;
	overflow: auto;
	width: 400px;
}

..report table.authRefData table{
	font-size: 1em;
}

/* Report Styles */
..pl a, .pl a:visited {
	color: black;
	text-decoration: none;
}

/* table */
..report {
	background-color: white;
	border: 2px solid #acf;
	clear: both;
	color: black;
	font: normal 8pt Helvetica, Arial, san-serif;
	margin-bottom: 2em;
}

..report hr {
	border: 1px solid #acf;
}

/* Top labels */
..report th {
	background-color: #acf;
	color: black;
	font-weight: bold;
	text-align: center;
}

..report th.void	{
	background-color: transparent;
	color: #000000;
	font: bold 10pt Helvetica, Arial, san-serif;
	text-align: left;
}

..report .pl {
	text-align: left;
	vertical-align: top;
	white-space: normal;
	width: 200px;
	white-space: normal; /* word-wrap: break-word; */
}

..report td.pl a.a {
	cursor: pointer;
	display: block;
	width: 200px;
	overflow: hidden;
}

..report td.pl div.a {
	width: 200px;
}

..report td.pl a:hover {
	background-color: #ffc;
}

/* Header rows... */
..report tr.rh {
	background-color: #acf;
	color: black;
	font-weight: bold;
}

/* Calendars... */
..report .rc {
	background-color: #f0f0f0;
}

/* Even rows... */
..report .re, .report .reu {
	background-color: #def;
}

..report .reu td {
	border-bottom: 1px solid black;
}

/* Odd rows... */
..report .ro, .report .rou {
	background-color: white;
}

..report .rou td {
	border-bottom: 1px solid black;
}

..report .rou table td, .report .reu table td {
	border-bottom: 0px solid black;
}

/* styles for footnote marker */
..report .fn {
	white-space: nowrap;
}

/* styles for numeric types */
..report .num, .report .nump {
	text-align: right;
	white-space: nowrap;
}

..report .nump {
	padding-left: 2em;
}

..report .nump {
	padding: 0px 0.4em 0px 2em;
}

/* styles for text types */
..report .text {
	text-align: left;
	white-space: normal;
}

..report .text .big {
	margin-bottom: 1em;
	width: 17em;
}

..report .text .more {
	display: none;
}

..report .text .note {
	font-style: italic;
	font-weight: bold;
}

..report .text .small {
	width: 10em;
}

..report sup {
	font-style: italic;
}

..report .outerFootnotes {
	font-size: 1em;
}
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>10
<FILENAME>FilingSummary.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<XML>
<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.22.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>1</ContextCount>
  <ElementCount>23</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>0</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>0</UnitCount>
  <MyReports>
    <Report instance="kalu-8k_20220426.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>100000 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kaiseraluminum.com/20220426/taxonomy/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="8-K" original="kalu-8k_20220426.htm">kalu-8k_20220426.htm</File>
    <File>kalu-20220426.xsd</File>
    <File>kalu-20220426_lab.xml</File>
    <File>kalu-20220426_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="23">http://xbrl.sec.gov/dei/2021q4</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>false</HasCalculationLinkbase>
</FilingSummary>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>JSON
<SEQUENCE>12
<FILENAME>MetaLinks.json
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
{
 "instance": {
  "kalu-8k_20220426.htm": {
   "axisCustom": 0,
   "axisStandard": 0,
   "contextCount": 1,
   "dts": {
    "inline": {
     "local": [
      "kalu-8k_20220426.htm"
     ]
    },
    "labelLink": {
     "local": [
      "kalu-20220426_lab.xml"
     ]
    },
    "presentationLink": {
     "local": [
      "kalu-20220426_pre.xml"
     ]
    },
    "schema": {
     "local": [
      "kalu-20220426.xsd"
     ],
     "remote": [
      "http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xl-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xlink-2003-12-31.xsd",
      "http://www.xbrl.org/2005/xbrldt-2005.xsd",
      "http://www.xbrl.org/2006/ref-2006-02-27.xsd",
      "http://www.xbrl.org/lrr/arcrole/factExplanatory-2009-12-16.xsd",
      "http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd",
      "http://www.xbrl.org/lrr/role/net-2009-12-16.xsd",
      "https://www.xbrl.org/2020/extensible-enumerations-2.0.xsd",
      "https://www.xbrl.org/dtr/type/2020-01-21/types.xsd",
      "https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd",
      "https://xbrl.fasb.org/srt/2021/elts/srt-roles-2021-01-31.xsd",
      "https://xbrl.fasb.org/srt/2021/elts/srt-types-2021-01-31.xsd",
      "https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd",
      "https://xbrl.fasb.org/us-gaap/2021/elts/us-roles-2021-01-31.xsd",
      "https://xbrl.fasb.org/us-gaap/2021/elts/us-types-2021-01-31.xsd",
      "https://xbrl.sec.gov/country/2021/country-2021.xsd",
      "https://xbrl.sec.gov/currency/2021/currency-2021.xsd",
      "https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd",
      "https://xbrl.sec.gov/exch/2021/exch-2021.xsd",
      "https://xbrl.sec.gov/naics/2021/naics-2021.xsd",
      "https://xbrl.sec.gov/sic/2021/sic-2021.xsd",
      "https://xbrl.sec.gov/stpr/2021/stpr-2021.xsd"
     ]
    }
   },
   "elementCount": 24,
   "entityCount": 1,
   "hidden": {
    "http://xbrl.sec.gov/dei/2021q4": 2,
    "total": 2
   },
   "keyCustom": 0,
   "keyStandard": 23,
   "memberCustom": 0,
   "memberStandard": 0,
   "nsprefix": "kalu",
   "nsuri": "http://www.kaiseraluminum.com/20220426",
   "report": {
    "R1": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "body",
       "html"
      ],
      "baseRef": "kalu-8k_20220426.htm",
      "contextRef": "C_0000811596_20220426_20220426",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "dei:DocumentType",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "document",
     "isDefault": "true",
     "longName": "100000 - Document - Document and Entity Information",
     "role": "http://www.kaiseraluminum.com/20220426/taxonomy/role/DocumentDocumentAndEntityInformation",
     "shortName": "Document and Entity Information",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "body",
       "html"
      ],
      "baseRef": "kalu-8k_20220426.htm",
      "contextRef": "C_0000811596_20220426_20220426",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "dei:DocumentType",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    }
   },
   "segmentCount": 0,
   "tag": {
    "dei_AmendmentFlag": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.",
        "label": "Amendment Flag",
        "terseLabel": "Amendment Flag"
       }
      }
     },
     "localname": "AmendmentFlag",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.kaiseraluminum.com/20220426/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_CityAreaCode": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Area code of city",
        "label": "City Area Code",
        "terseLabel": "City Area Code"
       }
      }
     },
     "localname": "CityAreaCode",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.kaiseraluminum.com/20220426/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_CoverAbstract": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Cover page.",
        "label": "Cover [Abstract]"
       }
      }
     },
     "localname": "CoverAbstract",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "xbrltype": "stringItemType"
    },
    "dei_DocumentPeriodEndDate": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period.  The format of the date is YYYY-MM-DD.",
        "label": "Document Period End Date",
        "terseLabel": "Document Period End Date"
       }
      }
     },
     "localname": "DocumentPeriodEndDate",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.kaiseraluminum.com/20220426/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "dateItemType"
    },
    "dei_DocumentType": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.",
        "label": "Document Type",
        "terseLabel": "Document Type"
       }
      }
     },
     "localname": "DocumentType",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.kaiseraluminum.com/20220426/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "submissionTypeItemType"
    },
    "dei_EntityAddressAddressLine1": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Address Line 1 such as Attn, Building Name, Street Name",
        "label": "Entity Address Address Line1",
        "terseLabel": "Entity Address, Address Line One"
       }
      }
     },
     "localname": "EntityAddressAddressLine1",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.kaiseraluminum.com/20220426/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressAddressLine2": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Address Line 2 such as Street or Suite number",
        "label": "Entity Address Address Line2",
        "terseLabel": "Entity Address, Address Line Two"
       }
      }
     },
     "localname": "EntityAddressAddressLine2",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.kaiseraluminum.com/20220426/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressCityOrTown": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Name of the City or Town",
        "label": "Entity Address City Or Town",
        "terseLabel": "Entity Address, City or Town"
       }
      }
     },
     "localname": "EntityAddressCityOrTown",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.kaiseraluminum.com/20220426/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressPostalZipCode": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Code for the postal or zip code",
        "label": "Entity Address Postal Zip Code",
        "terseLabel": "Entity Address, Postal Zip Code"
       }
      }
     },
     "localname": "EntityAddressPostalZipCode",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.kaiseraluminum.com/20220426/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressStateOrProvince": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Name of the state or province.",
        "label": "Entity Address State Or Province",
        "terseLabel": "Entity Address, State or Province"
       }
      }
     },
     "localname": "EntityAddressStateOrProvince",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.kaiseraluminum.com/20220426/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "stateOrProvinceItemType"
    },
    "dei_EntityCentralIndexKey": {
     "auth_ref": [
      "r1"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.",
        "label": "Entity Central Index Key",
        "terseLabel": "Entity Central Index Key"
       }
      }
     },
     "localname": "EntityCentralIndexKey",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.kaiseraluminum.com/20220426/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "centralIndexKeyItemType"
    },
    "dei_EntityEmergingGrowthCompany": {
     "auth_ref": [
      "r1"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicate if registrant meets the emerging growth company criteria.",
        "label": "Entity Emerging Growth Company",
        "terseLabel": "Entity Emerging Growth Company"
       }
      }
     },
     "localname": "EntityEmergingGrowthCompany",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.kaiseraluminum.com/20220426/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntityFileNumber": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.",
        "label": "Entity File Number",
        "terseLabel": "Entity File Number"
       }
      }
     },
     "localname": "EntityFileNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.kaiseraluminum.com/20220426/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "fileNumberItemType"
    },
    "dei_EntityIncorporationStateCountryCode": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Two-character EDGAR code representing the state or country of incorporation.",
        "label": "Entity Incorporation State Country Code",
        "terseLabel": "Entity Incorporation State Country Code"
       }
      }
     },
     "localname": "EntityIncorporationStateCountryCode",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.kaiseraluminum.com/20220426/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "edgarStateCountryItemType"
    },
    "dei_EntityRegistrantName": {
     "auth_ref": [
      "r1"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.",
        "label": "Entity Registrant Name",
        "terseLabel": "Entity Registrant Name"
       }
      }
     },
     "localname": "EntityRegistrantName",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.kaiseraluminum.com/20220426/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityTaxIdentificationNumber": {
     "auth_ref": [
      "r1"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.",
        "label": "Entity Tax Identification Number",
        "terseLabel": "Entity Tax Identification Number"
       }
      }
     },
     "localname": "EntityTaxIdentificationNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.kaiseraluminum.com/20220426/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "employerIdItemType"
    },
    "dei_LocalPhoneNumber": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Local phone number for entity.",
        "label": "Local Phone Number",
        "terseLabel": "Local Phone Number"
       }
      }
     },
     "localname": "LocalPhoneNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.kaiseraluminum.com/20220426/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_PreCommencementIssuerTenderOffer": {
     "auth_ref": [
      "r3"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.",
        "label": "Pre Commencement Issuer Tender Offer",
        "terseLabel": "Pre Commencement Issuer Tender Offer"
       }
      }
     },
     "localname": "PreCommencementIssuerTenderOffer",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.kaiseraluminum.com/20220426/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_PreCommencementTenderOffer": {
     "auth_ref": [
      "r4"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.",
        "label": "Pre Commencement Tender Offer",
        "terseLabel": "Pre Commencement Tender Offer"
       }
      }
     },
     "localname": "PreCommencementTenderOffer",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.kaiseraluminum.com/20220426/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_Security12bTitle": {
     "auth_ref": [
      "r0"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Title of a 12(b) registered security.",
        "label": "Security12b Title",
        "terseLabel": "Security 12b Title"
       }
      }
     },
     "localname": "Security12bTitle",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.kaiseraluminum.com/20220426/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "securityTitleItemType"
    },
    "dei_SecurityExchangeName": {
     "auth_ref": [
      "r2"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Name of the Exchange on which a security is registered.",
        "label": "Security Exchange Name",
        "terseLabel": "Security Exchange Name"
       }
      }
     },
     "localname": "SecurityExchangeName",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.kaiseraluminum.com/20220426/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "edgarExchangeCodeItemType"
    },
    "dei_SolicitingMaterial": {
     "auth_ref": [
      "r5"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.",
        "label": "Soliciting Material",
        "terseLabel": "Soliciting Material"
       }
      }
     },
     "localname": "SolicitingMaterial",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.kaiseraluminum.com/20220426/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_TradingSymbol": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Trading symbol of an instrument as listed on an exchange.",
        "label": "Trading Symbol",
        "terseLabel": "Trading Symbol"
       }
      }
     },
     "localname": "TradingSymbol",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.kaiseraluminum.com/20220426/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "tradingSymbolItemType"
    },
    "dei_WrittenCommunications": {
     "auth_ref": [
      "r6"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.",
        "label": "Written Communications",
        "terseLabel": "Written Communications"
       }
      }
     },
     "localname": "WrittenCommunications",
     "nsuri": "http://xbrl.sec.gov/dei/2021q4",
     "presentation": [
      "http://www.kaiseraluminum.com/20220426/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    }
   },
   "unitCount": 0
  }
 },
 "std_ref": {
  "r0": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "b"
  },
  "r1": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "b-2"
  },
  "r2": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "d1-1"
  },
  "r3": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "13e",
   "Subsection": "4c"
  },
  "r4": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "14d",
   "Subsection": "2b"
  },
  "r5": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "14a",
   "Subsection": "12"
  },
  "r6": {
   "Name": "Securities Act",
   "Number": "230",
   "Publisher": "SEC",
   "Section": "425"
  }
 },
 "version": "2.1"
}
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>ZIP
<SEQUENCE>13
<FILENAME>0001564590-22-016831-xbrl.zip
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
begin 644 0001564590-22-016831-xbrl.zip
M4$L#!!0    ( )&$G53J+C/CQ 0  ((6   1    :V%L=2TR,#(R,#0R-BYX
M<V2]6%MOVS84?A^P_\#JJ<6J:QP[-I(46=T  =RN<+*A;P5-40X1BE))*K'_
M?4G*E"5'=BTEG5]"\=P^GAL/<_YAE5+PB+D@&;MP0B]P &8HBPE;7CB%<*%
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MW.U[]E@Q=AB,'/CE_P%02P$"% ,4    " "1A)U4ZBXSX\0$  ""%@  $0
M            @ $     :V%L=2TR,#(R,#0R-BYX<V102P$"% ,4    " "1
MA)U4@PR)[A\'  !-3   %0              @ 'S!   :V%L=2TR,#(R,#0R
M-E]L86(N>&UL4$L! A0#%     @ D82=5"Q=2500!0  B2T  !4
M     ( !10P  &MA;'4M,C R,C T,C9?<')E+GAM;%!+ 0(4 Q0    ( )&$
MG52C,'GC?!$  +B)   4              "  8@1  !K86QU+3AK7S(P,C(P
=-#(V+FAT;5!+!08     !  $  <!   V(P     !

end
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
